Class i is also know as dust tight and can refer to metal or resilient seated valves. Oct 22, 2014 the fci control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. Leakage classification of control valves engineering toolbox. It is intended to eliminate present misunderstandings and to assist and guide those people involved in the. Instantly download the fci 70 2 20 control valve seat leakage. Classifications ansifci 702 defines six classifications of control continue reading. Foreword this foreword is included for information only and is not part of ansi fci 70 2 2006, control valve seat leakage. Responding to the industrys request, the fci has recently updated the standard to include class viii, which is a no permissible leakage or bubble tight standard generally associated with resilient seating regulators either balanced or unbalanced with o rings or other gapless seals.
This is closely related to seating force fully closed position. Developers included a lowpressure air test to determine seat leakage to class v. As with fugitive emissions, there are many different seat leakage classes for control valves and isolation valves. Leakage of valves testing api 598, ansi fci 702, msssp61. Fci 7032016 download ansi, icc, ul, asme standards. Is also know as dust tight and can refer to metal or resilient seated valves. It is strongly recommended that users of fci 70 2 also obtain a copy of fci 70 3. Ansifci 7022006 control valve seat leakage valvias. Selection of a leakage class is not restricted as to valve design, but acceptable values for various commercially available designs are suggested for each class under section 4. Ansifci 702 control valve leakage valve engineering. Aug 11, 2019 ansi fci 70 2 pdf control valve section. Jan 05, 20 there are actually six different seat leakage classifications as defined by ansi fci 70 2 1976r1982.
Ansi fci 70 2 20 control valve seat leakage fluid controls institute 20 9 pages more details. Fci 70 2 specifies leakage rates on a test stand with when tested according to the fci procedure usually 50 psi air at ambient temperature the fci leakage classes are a prety good. Control valve and regulator section notes that fci 702 has been intended to apply to control. Ansi fci 70 2 and iec 605344 are in unison with leakage classes and protocol. As for the shell test, its ok to use api 598 api 6d, since fci 70 2 doesnt cover such tests. Our policy towards the use of cookies techstreet, a clarivate analytics brand, uses cookies to improve your online experience. Oct 21, 2015 ansifci 7022006 american national standard control valve seat leakage fluid controls institute, inc.
Regulator seat leakage fluid controls institute on. Fci 70 2 class vi is for soft seated control valves but is frequently used as a leakage acceptance test criteria for metal seated isolation valves such as ball and butterfly valves. Ansifci 70220 control valve seat leakage fluid controls institute 20 9 pages. Bubbles per minute as tabulated are a suggested alternative based on a suitable. This standard does not apply to pressure regulators as defined in the following standards. There are actually six different seat leakage classifications as defined by ansifci 702 1976r1982. V alve testing standards msssp61 ansi fci 70 2 every valve testing standard has an acceptable leakage rate. In addition the guiding, the seat material, the actuator thrust, the pressure drop and the type of fluid all play part in how well particular control valves shuts off. Ansifci 7022006 control valve seat leakage pdf document. It is the kind of leakage rate you can expect from a valve with a metal plug and metal seat.
Control valve seat leakage, establishes a series of six seat leakage classes for control valves and defines the test procedures. Today, however, the class v test often applies to all types of control valveswith leakage rates that fall between the class iv and class vi test. This standard establishes a series of seat leakage classes for regulators and defines the production test procedures. Ansi fci 9112010, standard for qualifications of control valve stem seals. Fci 87 2 2015, power signal standard for springdiaphragm actuated control valves. Fci 70 2 20 control valve seat leakage codebookdownload. Fci fluid controls institute 70 2 also called ansi fci 70 2 this document is specifically for control valves, and in general allows higher leakage as a result. This standard establishes six classes of seat leakage for control valves. Control valve seat leakage classification ansi fci 70 2 2006 class vi maximum seat leakage allowable ansi fci 70 2 2006 bubbles per minute as tabulated are a suggested alternative based. There are six different seat leakage classifications as defined by ansi fci 702. Ansifci 7022006 standard establishes a series of seat leakage classes for control valves and defines the test procedures.
This standard sets forth criteria related to the general requirements, testing, permanent marking, selection, care, and use of protectors to minimize the occurrence and severity or prevention of injuries from such hazards as impact, nonionizing radiation and liquid splash. There are actually six different seat leakage classifications defined by ansi fci 70 2 2006 european equivalent standard iec 605344. Ansi fci 70 2 class iv shutoff packless construction trim options available for precise sizing great for fluid, gas, and vapor applications protected springs normally closed wide variety of pilots for many applications. Bubbles per minute as tabulated are a suggested alternative based on a suitably calibrated measuring device, in this case a. Fci 7032004 download ansi, icc, ul, asme standards. Ansifci standard 702, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves. Control valve seat leakage fluid controls institute on. There are six different seat leakage classifications as defined by ansi fci 70 2. Ansi fci 70 2 2006 standard establishes a series of seat leakage classes for control valves and defines the test procedures. It is the kind of leakage rate you can expect from a valve. But the fluid control institute fci also notes that the standard ansi fci 70 2 has been intended to apply to control valve seat leakage. Order this important seat leakage set and save on fci 70220 and 7032016. Page 8 guide to ansifci 7022006 class i modified class ii, iii or iv valves.
Control valve seat leakage classifications galloup. There are actually six different seat leakage classifications defined by ansi fci 70 2. Page 7 leakage rates available for standard products page 8 guide to ansifci 7022006 class i modified class ii. The common ones are ansi fci 70 2 iec 605344, api 598, mss sp61 and iso 5208. Ansifci 7032016, regulator seat leakage jordan valve. Classification of seat leakage through control seat leakage. No test required by agreement between user and supplier classes ii, iii and iv. Oct 14, 2014 ansifci 702 is the industry standard for control valve leakage. Class i is also known as dust tight and can refer to metal or resilient seated valves. Fci standards control valve section fluid controls institute. Fci, power signal standard for springdiaphragm actuated control valves. Control valve seat leakage classification ansi fci 70 2 2006 class vi maximum seat leakage allowable ansi fci 70 2 2006 bubbles per minute as tabulated are a suggested alternative based on a suitably calibrated measuring device, in this case, a 6 mm 0. Leakage classification of control valve ansifci 702.
Find the most uptodate version of fci 70 3 at engineering360. Jun 16, 2019 today, however, the class v test often applies to all types of control valveswith leakage rates that fall between the class iv and class vi test. Soft seat valves are those where either the plug or seat or both are made from some kind of. If line isolation andor absolute tight shutoff is a normal expectation of the valve application, the fci. American national standards institute ansi the ansi standard fci 702. Ansifci standard 702, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves scope. Amaryl lids to download pdf you need some things, like my website and the name of the file. Control valve seat leackage class vi maximun seat leackage. This voluntary standard has been compiled and issued in the. If line isolation andor absolute tight shutoff is a normal expectation of the valve allocation, fci. This standard is similar to ansi fci 70 2 control valve seat leakage. He should use fci 70 2 for seat leakage tests, for the simple reason that api 598 api 6d allowable leakages are meant for shutoff valves, therefore much more restrictive than fci 70 2. Ansifci 702 2006 american national standard control valve seat leakage fluid controls institute, inc.
Scope ansifci 702 is the industry standard for control valve leakage. Valve seat leakages fci 70 2 class, thread408301633. The fci control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. The most commonly used by gemco valve are class i, class iv and class vl. If line isolation andor absolute tight shutoff is a normal expectation of the valve application, the fci control valve and regulator sections recommend specifying another standard, such as api 598, valve test and inspection. Ansifci 702 defines six classifications of control valve leakage, providing test procedures and the maximal allowable leakage mal for each.
Ansi fci 70 2 2006 control valve seat leakage standard clarification, thread408265522. The most common used are class iv class vl class iv is also known as metal to metal. To api 598 or bs 6755 or ansi fci 70 2 class v or vi flow coefficients cv value as per the enclosed tables pages 6 through 11 temperature range from minus 196 degrees c to 600 degrees c main. Ansi fci standard 70 2, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves. Fci 8411985 r20, metric definition of the valve flow coefficient c v. Order this important seat leakage set and save on fci 70 2 20 and 70 32016. Also defined are specific test procedures to determine the appropriate class. Control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. This voluntary standard has been compiled and issued in the public interest. Ansi american national standards institute api american petroleum institute. This standard is similar to ansi 702, control valve seat leakage, but eliminates class v as this is generally not required in regulators. This standard is similar to ansi 70 2, control valve seat leakage, but eliminates class v as this is. They were placed on your computer when you launched this website.